transmission whining!

i have a 95 geo metro lsi with 1.3 engine an 5 speed manual transmission. when i go into 5 gear you hear a whing noise. sometimes its loud sometimes its not. 5th is the only time it does it, still shifts great. any ideas why it is doing this, an what can be done? thanks for any help.

Mike, have you checked your transmission oil level yet? Maybe it's low on oil(?) That's all I can think of that's easy. My trans (5 speed stick) was real "notchy" shifting when I first got the car but after two tranny oil flushes, about two weeks driving between each one, it began shifting and downshifting real smooth again. I got what looked like mud out of it the first draining. Maybe this will be YOUR story? Only other thing I can come up with is a bad bearing or ring & pinion. So let's try the oil flush first. Hope this helps you a little. DangerDude

Change the fluid (maybe try some lucas in with it?) and start saving for a new/used/rebuilt unit. Like Danger said it's probably a bearing, or a funny wear pattern on the 5th gear pair. You could always remove the tranny, crack it open and replace the worn out stuff :thumbsup:

-MechanicMatt

I want to thank both of you for the help. gonna try changing the gear oil an add some lucas oil. maybe it will help. if not i will just rebuild it. again thanks for the info guys!